There is an alloy hook on the back of the strap. You can attach a leather belt to control the puppy when walking, running, shopping and training, you can enjoy freedom and safety. Safety - The tape reflective ensures that the car can see the dog in the dark night and low light conditions. Comfortable - the front fabric is breathable and comfortable polyester, so the dog will not feel stuffy . Easy to carry - The adjustable shoulder strap fits the dog's body better. The buttons can be fixed after pasting the velcro, which is safe and firm. Easy to control outside and traction. High-gloss reflective strips can better protect dogs' safety in low light conditions and dark nights. Adjustable shoulder strap fits dog's body perfectly. Made of high quality polyester material, the seat belt is filled with soft mesh. By adjusting the Velcro and quick release buckle, donning and doffing becomes so easy. Please note the following Please measure your pet's bust before ordering, do not choose a size based on weight alone. When measuring a pet's bust pet, please allow 1-3cm tolerance. If your pet's hair is long and flowery, please allow 1-3cm when choosing the size. If your pet grows, I suggest you choose a larger size to ensure their comfort in the future. Size: L size Adjustable chest circumference is about 46-60cm, band loop length is about 1.5cm, pull length is about 110cm, suitable for dogs weighing 13-20kg. Color: Black Scope of delivery: 1 piece.